author: Amol S. Deshmukh < amolweb at ya hoo dot com > author: Support for hyperbolic trig functions was added as a part of author: Java distribution only in JDK1.5. This class uses custom author: naive implementation based on formulas at: author: http://www.math2.org/math/trig/hyperbolics.htm author: These formulas seem to agree with excel's implementation.